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UPVC Door Handles Replacement Guide Replacing upvc door handles is a straightforward DIY project once you have the proper measurements. These measurements include the distance between the backplate of the handle's fixing centres (sometimes called PZ) and the centre of the key hole. The most popular kind of uPVC door handle comes with two inline levers, one internal and one external connected by spindle. They are used to operate the multipoint lock that is found on uPVC and aluminium doors as well as some wooden doors. Brands Finishes A damaged